welcome to HCM!
lumps in the neck are common and their cause is usually benign.
your lumps are persisting since the last five years and have grown a little as you said so it is very essential to find out what actually they are,as they can be just chronically inflammed lymph nodes or sebaceous cysts /lipoma
/branchial cysts.but it is very essential to rule out lymphomas or tubercular lymphadenitis
or may be parotid neoplasm/inflammation. please get an FNAC done to find out their cause and decrease your anxiety
about them.Take care!